If you want the installation in a Linux environnent with command lines, take a look here.
You must have a MyCrypNet access first. You can buy one here or ask a delegation to someone who bought one.
Step 1: Download and install the software
From a package repository. For “Debian-like”:
sudo apt-get install openvpn resolvconf network-manager-openvpn-gnome
Step 2: Download the settings file
Download the MyCrypNet.conf file and put it into a dedicated folder. MyCrypNet.conf
Make sure to keep this folder in a safe place on your disk.
Step 3: Download the key and certificate
Download the two settings files (vpn.cert and vpn.key) from the “Your apps” page or the “Delegated apps” page and put them together into the same folder as the MyCrypNet.conf file.
Step 4: Open the configuration interface
Go to the Gnome menu and select “VPN Off”.
Click on “VPN Settings”.
Step 5: Load the configuration
Add a VPN configuration by clicking on the “+” on the “VPN” section.
Select “Import from file…” and look for the MyCrypNet.conf file.
Sometimes GNOME® bugs and force you to save the configuration (by clicking on the “save” button) in order to make it work.
Step 6: Check the configuration
You should see the VPN configuration appearing on the “VPN” section.
Check the “OFF” switch to start the configuration. If the “OFF” goes back, you should open your configuration, click “save” then check the “OFF” switch again.
Create your secure network